Go to a garden patch and get all your sims to plant your most expensive plant. Next double click the home button and hold the sims freeplay button and delete the history by pressing the dash. Next go to date and time and set the date to two years back go onto sims wait for it to to load. When it has go to date and time and set the date to 1year ahead of the actual year then go onto sims and the plant will be done.